Fluid control device



FLUIDCONTROL DEVICE Filed Nov. 2, 1938 INVENTOR. .IValfer H Freygang ATTORNEY.

Patented EeB. .24, 1942 OFFICE FLU1 D ooNTaon DEVICE.

Walter H. Freygang, Essex Fells, N. .Lfassignor to Specialties Development Corporation, Bloomfield, N. J .jya corporation 01' New Jersey Application November 2, 1938, S erlalNo. 238.391

' 7 Claims. (01. 137-139) The present invention'relates to therelease or carbondioxide under pressure for the purpose fluid from the container to operate the main valve.

of extinguishing fire, but, as will be readily understood, is capable of application for other purposes.

In its broader aspect the invention has refer ence to a, device for releasing'a fluid medifim under pressure normally restrained by a pressure operable main fluid flow controlling member, in

which an auxiliary 'or pilot. member is provided to release a portion of the fluid medium under pressure to'act on the pressure operable main fluid flow controlling member to thereby actuate the same, L

In a more limited aspect the invention relates to a device 01' the type reterred to in which a seat type valve, held onto its seat principally by the pressure of the fluid it c0nfines,.is interposed between the fluid under pressure and the delivery passage, and in which in addition. to the main 4 valve an auxiliaryvalve is provided, controlling i a fluidflow passage through the main valve, fluid released by the auxiliary valve through said pas-- Self-energizing fluid release device, now Patent No. 2,206,818 of July 'z, 1940, the subject of the present application will be found to differ therefrom more particularly in the provision oi novel means for the control of the pilot valve and, the general arrangement of the ope'rating mechanism.

It is a broad object of my invention to provide a fluid releasing device,: in which the pressure of fluid in the container 'is utilized to operate the main fluid release device of the container.

It is a further object'of the'invention to provide a releasing device in which the mainvalve of a fluid container is operated by a fluid pressure operated member actuated by fluid initially released from the container by means of a pilot valve. a

A more specific object of the invention is to provide in connection with a container having Further objects and features or the invention, not specifically enumerated above, will become. apparent as the invention is described in greater detail in connection with the accompanying drawing, wherein: p I Figure l is a vertical sectional view of the fluid medium release deviceinaccordance with my invention as applied'to-a high pressure fluid container.

Figure 2 is a detail 01' thedevice of Figure 1. In Figure 1, I. is a fluid pressure container for carbon dioxide oi conventional design whose outlet is controlled by therelea'se device in accordance with the present invention. This device has a valve body [threaded at Pinto the outlet of container I. Body 2 isprovided with a v'alve'chamber l, forming a valve seat 5, onwhichis seated by means of the pressure actin on it from within container l the' main valve consisting 01' a metallic frame 1 embedded'ln .a

v tition l2 formed in valve body 2 past a leakage preventin gasket l3 held in place by'a nipple l4 threaded into a recess in partition I2, and

which finally extends "into chamber l5 where it carries, secured to Why means of threads is,

piston I I movable in said chamber Piston ll carries leakage preventing packing ring l9 and on its nether side a seating ring I9. preferably of a substance similar to rubber, which seats on a seat 20 formedby the floor of chamber IS on the downward stroke of piston I]. A passage 2| through valve 8 and stem 9 which extends through piston I1 is controlled by pilot valve 22, held in its place against main valve 9 by spring23 supported in a recess 24 of the'spider member 25 press-fltted into the nether opening of valve body 2, which spider also serves to guide said pilot valve. A control rod 29ior the an outlet opening controlled by aseat type valve,

open the valve, and. va quickly and positively actpilot valve 22 extends through passage of 'the main valve 6 and valve stem 9, through-the body of piston l1 and terminates'anchored at 21 in the lower portion of thimble 22. Thimble 28 and with it control rod 26 are movable with respect to 'a threaded recess 29 in piston by means of the quick thread 30; An actuating member 31 to which is secured the turning handle 321s able to. turn said thimble by means of the coupling piece 33 which is fastened by threads 34 ing pilot fluid control valve to initially release on its upper portion into the actuating member lar space around actuating member 3|.

a corresponding groove 36 in the upper portion of thimble ,28. Thimble 28 carries anchored in its upper portion a second control rod 3'! which passes through groove 36, a central passage 38 in coupling piece 33, and into a recess 39 in ac tuating member 3| where it controls an exhaust valve/40, preferably made of a rubber-like material, which is urged by spring 4| onto a seat 42 ,formed on the uppermost portion of coupling piece 33. Recess 38 is vented to the atmosphere by means of angular passage 43 and a'circular recess 44- in the valve cap 45, forming an annu- Valve cap 45 is threaded into valve body 2 by means of threads 46. 41' and #8 are leakage preventing packing gaskets, while 4s and 50 indicate a lock nut and a washer locking the assembly to actuating member 3|. Passages in thimble 28 establish a fluid flow connection between passage 2| and the upper part of chamber I5. Passage 52 serves to vent the lower part of chamber IE to the atmosphere, while 53 shows the outlet to receive the escaping fluid medium, not shown in the drawing.

Fig, 2 is a top plan of spider member 25.

In the operation of my invention, a turning of handle 32 and with it of actuating member 3| and coupling piece 33 causes thimble 28 to descend in recess 29 by means of quick threads 30. ,Control rods 26 and .31 follow the descent port to which may be connected a discharge line will be seen'iurther that invention accomplishes the various objects pointed out at the beginning of this specification. Finally, while I my invention has beenillustrated and described with specific reference to the accompanying drawing, it will be apparent to those skilled in the art that the invention resides in certain principles of operation and construction which may be embodied in various other forms oi construction without departing in any manner from the spirit and scope oi. the invention, and! thereiore do not wish to be limited to the specific disclosure, but rather to the scope of the appended claims. v I

I claim:-

1. Ina control device for a fluid medium under pressure, a main seat type valve, a fluid pressure actuatable piston of greater area adapted to operate said valve against the pressure 02- the fluid medium, a connecting member tying said main valve and piston, a pilot valve operableto control a fluid flow passageirom the source of pressure to a space adjacent to said piston, an

exhaust valve controlling 'an exhaust passage from said space to the atmosphere, a member controlling both the pilot and exhaust valves having a length less than the distance between said pilot and exhaust valves and adapted to al- I temately engage and disengage the pilot and exof thimble 28, on the one hand permitting exhaust valve 40 to seat on valve seat 42, on the other hand pushing pilot valve 22 ofi its seat surrounding the mouth of passage 2| in main valve 6. Fluid medium, under pressure, which, by virtue of apertures in spider member 25, is normally present in the space adjacent pilot valve 22, and is now able to pass through passage 2i, passages 5| and out into the upper portion of Piston chamber 55 from where it is not able to. escape because of valve 40. As soon as it is of sufflcient magnitude, the pressure on top of piston pushes it downward, unseating main valve 6 against the fluid pressure in container and allowing now the full discharge of fluid medium through outlet chamber l8 and outlet port 53. It may be remarked here that the top face of piston H is proportionately larger than the nether surface of main valve 5 so as to make possible the establishment thereon oi a force sufflcient to overcome the pressure acting on valve 6. Any air or fluid medium present in the lower part of piston chamber to that might oppose the descent of the piston is vented through vent passage 52; In shutting ed the flow of the medium, handle 32- is turned in the reverse sense, causing the ascent of thimble 28 together with control rods 26 and 31. ,This permits spring 23 to return pilot valve 22 to its seat against the under side of main valve 6, and causes themseating of exhaust valve 40. This cuts off the space atop of piston *l'l from its supply of fluid pressure and permits any gas in said space to ex- .haust to the atmosphere through passage 38, re-

haust valves, whereby one valve is closed tore the other is opened, and actuating means to the controlling member. l

2. In a control device for a fluid medium under pressure, a main seat type valve, a fluid pressure actuatable piston. of greater area adapt ed to operate said valve against the pressure of the fluid medium, a connecting member tying said main valveand piston, a pilot valve adjacent to and seating on said main valve operable to control a fluid flow passage from the source of pressure to a space adjacent to said piston, said pilot valve being spring-loaded and structurally independent oi the device, an exhaust valve controlling an exhaust passage from said space to the atmosphere, said exhaust valve being spring-loaded and unconnected with any other element, all of said elements being disposed substantially coaxially with respect to each other, a member controlling both the pilot and exhaust valve mounted in said piston for coaxial reciprocation with respect thereto and adapted pilot valve extending through the main valve, the connecting member, and the controlling member;

said exhaust passage extending through the controlling member and the actuating means; and said controlling member including elements adapted to extend through said fluid flow and exhaust passages for engaging and disengaging said pilot and exhaust valves upon reciprocati n or the controlling member.

3. In a control device for a fluid medium under pressure, a main seat type valve, a fluid pressure actuatable piston of greater area adapted to operate said valve against the pressure of the fluid medium, a connecting member tying said main valve and piston, a pilot valve operable to control a fluid flow passage from the source of pressure to a space adjacent to said piston, said pilot valve being yieldingly urged toward its 103.

in; position, an exhaust valve controlling an exsaidmain valve and piston, a pilot valve adjacent to and seating on said main valve operable to control a fluid flow passage from the source of pressure to a space adjacent to said piston, said pilot valve being spring-loaded and structurally independent 01' \the device, an exhaust valve controlling an exhaust passage from said space to the atmosphere, said exhaust valve beingspring-loaded and unconnected with any otherelement, all of said elements being disposed substantially coaxially'with respect to each other, a member having a rotatable screw-threaded engagement with the piston controlling both the pilot and exhaust valves for coaxial reciprocation with respect thereto and adapted to alternately engage and disengage said valves, whereby one valve is closed when the other is opened, and actuating means for the controlling member; said fluid flow passage controlled by the pilot valve extending through the main valve, the connectin member and the controlling member; "said exhaust passage extending through the controlling memher and the actuating means; and said controlling member including elements adapted to extend through said fluid flow and exhaust passages for engaging and disengaging said pilot and exhaust valves upon reciprocation of thecontrolling member.

5. In a fluid pressure piston operated valve,

, having a pilot and an exhaust valve, the combination of a piston, a control member for the pilot and exhaust valves, and actuating means for said control member, said control member having a rotatable screw-threaded engagement with the piston for coaxial. reciprocation with respect thereto and for movement therewith and for reciprocation with respect to said actuating means.

6. In a control device for a fluid medium under 1 pressure, a main seat type valve, a fluid pressure actuatable piston of greater area adapted to operate said valve against the pressure of the fluid medium, a connecting member tying said main valve and piston, a pilot valve adjacent to and seating on said main valve operable to control a fluid flow passage from the source of pressure to a space adjacent to said piston, an exhaust v valve controlling an exhaust passage from said space to the atmosphere, a member controlling said pilot valve and said exhaust valve extending through a portion of said fluid flow passage, said passage extending through the main valve, the connecting member and a portion of the controlling member, and actuating means for the controlling member comprising control member operating elements outside and inside said device whereby said control member upon actuation is adapted to move first relative to and then with said piston.

\ 7. 'In a control device for a fluid medium under pressure, a main seat type valve, a fluid pressure actuatable piston of greater area adapted to operate said valve against the pressure of the fluid .medium, a connecting member tying said main valve and piston, a pilot valve operable to control a fluid flow passage from the source of pressure to a space adjacent to said piston, said pilot valve being yieldingly urged toward its closing position, an exhaust. valve controlling anexh'aust passage from said space to the atmosphere, said exhaust valve being yieldingly urged toward its closing position, all'of the said elements being disposed substantially coaxially with respect to each other,

a member controlling both the pilot and exhaust valveshaving a, length'less than the-distance between said pilot and exhaust valves, actuatable supporting means for said control member in said piston, whereby said control member is adapted for the controlling member.

WALTER .H. FnEYGANo. 

